﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;

namespace Xceed.Silverlight.Data
{
  internal sealed class GroupCollectionChangedEventArgs : EventArgs
  {
    #region Constructors

    internal GroupCollectionChangedEventArgs( GroupCollectionChangedAction action )
      : this( action, null )
    {
      switch( action )
      {
        case GroupCollectionChangedAction.CollapseAll:
        case GroupCollectionChangedAction.ExpandAll:
          break;

        default:
          throw new ArgumentException( "Only the CollapseAll and ExpandAll actions are supported by this constructor.", "action" );
      }

      this.Action = action;
    }

    internal GroupCollectionChangedEventArgs( GroupCollectionChangedAction action, object target )
    {
      if( target == null )
      {
        if( ( action != GroupCollectionChangedAction.CollapseAll )
          && ( action != GroupCollectionChangedAction.ExpandAll ) )
          throw new ArgumentException( "Only the CollapseAll and ExpandAll actions are supported by this constructor.", "action" );
      }
      else
      {
        if( ( action != GroupCollectionChangedAction.Collapse )
          && ( action != GroupCollectionChangedAction.Expand ) )
          throw new ArgumentException( "Only the Collapse and Expand actions are supported by this constructor.", "action" );
      }

      this.Action = action;
      this.Target = target;
    }

    #endregion

    #region Action Property

    public GroupCollectionChangedAction Action
    {
      get;
      private set;
    }

    #endregion

    #region Target Property

    public object Target
    {
      get;
      private set;
    }

    #endregion
  }
}
